~carriage bolt/mushroom square neck bolt /cup head square neck bolt
Material Stainless Steel,carbon Steel,Brass,Bronze,Alloy steel,etc
Standard DIN,ISO,DIN,ANSI,JIS,BS,non-standard
Size M5-M20 Or according to your requirements
Grade 4.8,8.8,10.9,12.9
Length  5-1000mm
Color  Natural Or according to your requirements
Surface Treatment Zn-Plated, Ni-plated, Tin-plated,Passivated,Sandblast and Anodize;Chromate, Polish, Electro Painting, Black Anodize, Plain, Chrome plated;Hot Deep Galvanize(H.D.G.) etc
Heat treatmen Tempering,Hardening,Spheroidizing,Stress Relieving.
head type  Various head style
Application  machinery,electric products,valve or pipeline,chemical equipment,new energy,fluid equipment,engineering equipment,etc